ELECTRICALLY OPERATED CONTROLS, AND PARTS THEREOF, HAVING TIME ORIENTED OPERATION TO CONTROL A FLOW OF CURRENT TO ELECTRICAL EQUIPMENT; TIMERS AND TIME SWITCHES OF THE TYPE INCLUDING CYCLE REPEATERS, TIME TOTALIZERS, TIME DELAY DEVICES AND ELECTRIC TIMING DEVICES OF THE HOROLOGICAL TYPE; ELECTRIC METERS; TACHOMETERS; RADAR ANTENNAS, PEDESTALS, DRIVES, AND TRACKING SYSTEMS, AND PARTS THEREOF; NUCLEAR REACTORS, FUEL ELEMENTS, AND CONTROL SYSTEMS THEREFOR AND PARTS THEREOF; NUCLEAR WASTE CONCENTRATION SYSTEMS, AND PARTS THEREOF; GOGGLES; ELECTRICAL TEST EQUIPMENT OF THE TYPE INCLUDING CIRCUIT CONTINUITY TESTERS, LABORATORY METERS AND AMPLIFIERS, X-RAY ANALYZERS, SPECTROSCOPY EQUIPMENT AND NEUTRON RADIATION DETECTING AND MEASURING DEVICES; EDUCATIONAL DEVICES AND EQUIPMENT FOR TEACHING PRINCIPLES OF PHYSICS, CIRCUITRY AND THE USE OF ELECTRICAL AND ELECTRONIC COMPONENTS AND EQUIPMENT OF THE TYPE INCLUDING EDUCATIONAL COMPUTERS, LOGIC CIRCUIT BOARDS, RELAY DEMONSTRATORS, SPRING MASS DEMONSTRATORS, TORQUE AMPLIFIERS, RESONANT CIRCUIT BOARDS AND MUSCLE COORDINATION TESTERS; SATELLITE INSTRUMENTATIONS OF THE TYPE INCLUDING X-RAY, INFRARED AND ULTRA-VIOLET RADIATION SENSORS, AND ULTRA-SONIC FLOW TRANSDUCERS; AND OCEAN-OGRAPHIC EQUIPMENT AND INSTRUMENTATIONS AND PARTS THEREOF TO BE SUBMERGED AND FOR SHIPBOARD INSTALLATION OF THE TYPE INCLUDING ACOUSTIC COMMAND SYSTEMS, NAVIGATION RECEIVERS, REMOTE AND TIME CONTROLS AND RELEASE DEVICES, AND ACOUSTIC TRANSPONDERS